摘要
针对近距离下伏煤层区段煤柱留设不合理导致的煤柱资源损失问题,文章采用理论分析与数值模拟相结合的方法,对近距离下伏煤层区段煤柱合理尺寸优化方法进行了研究。结果表明:煤柱宽度越小,煤柱所受载荷越集中,峰值应力向内转移,塑性区宽度随之增大;利用下煤层应力极限平衡区宽度理论修正式,计算得到区段煤柱保持稳定的最小宽度为17.17 m;结合数值模拟分析,下伏煤层区段煤柱宽度不应小于17 m,据此提出将辅运巷向运输巷方向移动6.8 m布置在低应力扰动区,确定合理煤柱宽度为17.2 m,有效释放了煤柱资源。
Aiming at the problem of coal pillar resource loss caused by unreasonable retention of coal pillars in the short-distance underlying coal seam section,this paper adopts the method of combining theoretical analysis and numerical simulation to optimize the reasonable size of the coal pillar in the short-distance underlying coal seam section were studied.The results show that the smaller width of the coal pillar,the more concentrated the load on the coal pillar,the peak stress is transferred inward,and the width of the plastic zone increases accordingly.The minimum stable width is 17.17 m;combined with numerical simulation analysis,the width of the coal pillar in the underlying coal seam section should not be less than 17 m.Based on this,it is proposed to move the auxiliary transportation roadway to the direction of the transportation roadway by 6.8 m and arrange it in the low stress disturbance area,which is finally determined to be reasonable.The coal pillar width is 17.2 m,effectively releasing coal pillar resources.
作者
杨志弘
YANG Zhihong(Shanxi Xinzhou Shenda Nancha Mining Industry Co.,Ltd.,Xinzhou 036700,China)
出处
《煤》
2023年第3期26-30,39,共6页
Coal
基金
内蒙古自治区高等学校科学研究资助项目(NJZY21387)。
关键词
近距离煤层
区段煤柱
理论分析
数值模拟
尺寸优化
contiguous seam
section coal pillar
theoretical analysis
numerical simulation
size optimization
